Abstract: A cutting crown fixing for positively locking and non-rotatable fixing of a cutting crown to a holder associated therewith of a comminuting apparatus, in particular a rotor of a comminuting apparatus, including a cutting crown, a cutting crown holder associated with the cutting crown, a screw bolt and a thread insert having a head portion and a shaft portion, wherein the thread insert has a female thread complementary to the male thread of the screw bolt and the cutting crown holder has a through passage for receiving the screw bolt, and in the installed position the thread insert is arranged in positively locking relationship in the axial and tangential direction in a holding opening of the cutting crown associated therewith.

Abstract: A material processing tool assembly includes a tool for material processing having a base section and a processing section extending from the base section; and a tool mounting block mountable on an outer surface of a support base. The mounting block has a base surface and a tool mounting surface intersecting the base surface. The base surface has a protuberance extending away therefrom and spaced apart from the tool mounting surface to define a tool receiving gap between the protuberance and the tool mounting surface. The base section of the tool is snugly received in the tool receiving gap between the tool mounting surface and the protuberance in abutment with the tool mounting surface, the processing section of the tool extending past the protuberance. A displaceable material processing head and method of mounting a material processing tool to a mounting block secured to a displaceable head are also discussed.

Abstract: A cutting tool includes a two-way indexable cutting insert clamped in a transversely oriented insert receiving pocket of an insert holder. The insert holder includes a forwardly located insert mounting portion that includes upper and lower jaws which together define the insert receiving pocket having a pocket front opening. The lower jaw includes a pocket lower clamping surface. The upper jaw includes a pocket upper clamping surface which faces mutually towards the pocket lower clamping surface and a pocket stopper surface facing generally towards the pocket front opening. The pocket stopper surface is closer to the pocket lower clamping surface and further from the pocket front opening, than the pocket upper clamping surface. The pocket stopper surface is further from the pocket rear opening than the pocket lower clamping surface.

Abstract: A cutting tool for radial and axial recessing and for lateral motion for so-called grooving of primarily metallic materials. The cutting tool has a clamping holder and a cutting element base, fastened to the clamping holder, on which a cutting element rests. The cutting element is pressed onto the cutting element base by a clamping finger of a clamping claw, and the cutting element being guided on the cutting element base with a prism.

Abstract: A cutting insert has an upper abutment portion at an upper surface thereof, and two bottom abutment portions and a stopper portion, at a bottom surface thereof. The two bottom abutment portions define bottom planes, parallel and spaced apart from one another. The upper abutment surface defines an upper plane, forming a first angle with the bottom planes. The cutting insert has a relief surface at a front surface thereof, forming a cutting edge with a rake surface formed at the upper surface. The stopper portion defines a stopper plane, which forms a second angle with a relief plane defined by the relief surface. A reference plane perpendicular to the upper plane, passing through the upper abutment portion, intersects the first and second bottom planes at first and second intersection lines, which are spaced apart from the first and second bottom abutment portions.

Abstract: A cutting tool that includes a base body including at least one deformable clamping element and at least one bit seat in which an insert is positionable, and at least one control element positioned in a recess of the base body. The at least one control element is positionable to bias the at least one deformable clamping element against the insert to hold the insert in the at least one bit seat.

Abstract: Safety chain and rotatable devices, used on saws or other machines for cutting or abrading material, include a plurality of holding members on which replaceable teeth are retained. Safety lobes prevent the teeth from being dislodged during operation of the saw. The safety lobes may be disposed on a link located in front of the holding member or disposed on a link located in back of the holding member, or both. The teeth can include sharp edges adapted for cutting various materials including wood, plastic and metal and can be formed with abrasive surfaces for abrading materials including brick and concrete. The teeth are quickly removable from the saw without the need for fasteners. While the teeth may be retained by engagement between the teeth and holding member, the chain and rotatable devices may retain the teeth on the holding members using only the safety lobes or safety surfaces. The rotational device can include two blades each including holding members and safety lobes.

Abstract: The invention relates to a cutting tool, for example, a saw blade (1) with a base body (2) that has at least one bit seat in which an insert (7) is held. It is provided according to the invention that the base body (2) has at least one elastically deformable clamping element (3) that can be placed against the insert (7) with the aid of a control element (5) positioned in a recess of the base body (2) in order to hold the insert in the bit seat.

Abstract: The disc saw blade has a plurality of arcuate teeth detachably mounted in complementary-shaped arcuate sockets provided in a rim portion around the circumference thereof. Each tooth has a portion butting against a stop, such as a transverse tail stop surface defined by an inward projection of the socket. The configuration provides a small throw entry gap to reduce the likelihood of sticks being thrown. The teeth preferably are detachably mounted by virtue of a tight fit within the sockets, with no use of fasteners to absorb cutting forces. Keying elements such as a male portion of generally rectangular cross-section extending from the socket into a corresponding female portion in the tooth preferably are used to ensure proper alignment of each tooth relative to the plane of the disc saw blade. Preferably, the teeth and sockets are parts of concentric circles, the diameter of the teeth preferably being slightly larger than the diameter of the sockets, thereby producing a press fit.

Abstract: A saw tooth for a circular saw for a feller including, in one embodiment, a square saw tooth head having a frusto-pyramidal shape to be mounted on a holder, and the saw tooth head includes seats for receiving inserts. The inserts are provided with cutting tips and cutting edges while a clamp nut retains the inserts against the tooth head. When the edges and tips are worn or damaged from impact, the inserts are first replaced. When the seat of the head is damaged, the tooth can be rotated.

Abstract: A cutter blade is provided having a cutting face. Formed in the cutting face are a plurality of spaced apart slots, each slot having forward and rearward sidewalls. A tooth is removably received in each of the slots, each tooth having a top surface extending above the cutting face and having forward and rearward sidewalls, The top surface of each tooth has a forward cutting edge and a rearward reduced height step section. A retention bar is provided for each tooth, each retention bar having a forward end that is received in the step section. A pin extending through an opening in each retention bar is threadably connected to the cutting face. By tightening the threaded pin the retention bar retains each tooth during cutting operation so that the tooth sidewalls frictionally engage the slot sidewalls and by unthreading the pin the retention bar may be rotated to permit removal and replacement of each of the teeth.

Abstract: A circular saw blade in which tooth assemblies are pivotally mounted along the periphery of the disc spaced apart at equal angular distances. Each tooth assembly has a U-shaped tooth wedging member pivotally mounted on the disc. The tooth is secured between the disc and the wedging member. Pivotal movement of the tooth wedging member in one direction wedges the tooth between the disc and the tooth wedging member. Pivotal movement of the tootrh wedging member in an opposite direction releases the tooth from the wedging action between the disc and the wedging member. A cam locking member is rotatably mounted on the disc adjacent the wedging member. Rotation of the cam locking member in one direction locks the tooth wedging member in the tooth wedging mode. Rotation of the cam locking member in an opposite direction unlocks the tooth wedging member to enable the tooth to be released from the wedging action between the disc and the tooth wedging member.

Abstract: Mounting of the circularly fitted inserted tooth of a circular saw. An inserted tooth (4) having a circular mounting surface is mounted on a blade body (1) and into a round-bottomed notch whose opposite edges are parallel. Tooth (4) is locked in the notch by means of a rivet (6) which is positioned in a juncture between the removable tooth and the blade body along a straight portion of the edge of a notch. Such locking facilitates a strong design for said tooth and even a loose tooth can be re-tightened in position by means of the flattening pressure of said rivet.